diff --git a/themes/book b/themes/book
index a656d71..98d19b8 160000
--- a/themes/book
+++ b/themes/book
@@ -1 +1 @@
-Subproject commit a656d711bf1316ed16208d0b3ceb8b8ef5f626cf
+Subproject commit 98d19b8e95019534622fd4c5eae707423730df2c